diff --git a/src/uncategorized/BackwardsCompatibility.tw b/src/uncategorized/BackwardsCompatibility.tw
index ce4f587e102a33cbba8dd4ca6f996136b611d87a..257f8af346c5e8bbb32ef8459af3be5d85648684 100644
--- a/src/uncategorized/BackwardsCompatibility.tw
+++ b/src/uncategorized/BackwardsCompatibility.tw
@@ -3606,6 +3606,7 @@ Setting missing slave variables:
 <<if $nurseryNannies > 0>>
 	<<for _bci = 0; _bci < $cribs.length; _bci++>>
 		<<set _incubatedSlave = $cribs[_bci]>>
+		<<set _incubatedSlave.pregType = 0>>
 		<<PMODinit _incubatedSlave>>
 	<</for>>
 <</if>>